JP2009043361A - Optical disk reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk reproducing apparatus that can reduce time for generating thumbnails, record the thumbnails per optical disk, and can edit the content of the thumbnails. <P>SOLUTION: The optical disk reproducing apparatus has a thumbnail generating section that generates a thumbnail from an image extracted from a moving image or a still image recorded in an optical disk such as a DVD and a list displaying section that displays data recorded in the optical disk briefly using a thumbnail. The optical disk reproducing apparatus further has an identification information acquiring section that acquires identification information for identifying the optical disk uniquely from information recorded in a predetermined recording region of the optical disk, a reproduction time generating section that, when reproduction of the optical disk is started, generates a thumbnail from an image being reproduced using the thumbnail generating section per a predetermined time period, and a thumbnail recording section that records associated information that associates the thumbnail generated by the thumbnail generating section and the identification information in a memory with the thumbnail. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical disc playback apparatus that plays back an image recorded on an optical disc, and more particularly to an optical disc playback apparatus that can display the contents of an image recorded on an optical disc using thumbnails (= representative images).

  In recent years, optical disc playback devices such as DVD (Digital Versatile Disk) players and BD (Blu-ray Disc) players are widely used as devices for playing back images and sounds. Many of these optical disk playback apparatuses have a thumbnail display function as a function for simply presenting information about still images and moving images recorded on an optical disk to a user.

  The thumbnail display function is a function for generating thumbnails by performing reduction conversion on an image extracted from a still image or a moving image and displaying the thumbnails on the title list screen or the like in order to simply show the contents of the images. Thereby, the user can understand the content of the image to some extent without reproducing the image.

  There are multiple types of thumbnails depending on the generation process. For example, a chapter thumbnail generated in advance for each chapter of a moving image and recorded on the optical disc, an original thumbnail generated by extracting an image included in the optical disc by the optical disc playback device, or generated by a user specifying an image There is a user thumbnail. The original thumbnail and the user thumbnail are recorded in a recording unit such as a memory.

  The original thumbnail and the user thumbnail generated in this way are stored for a long time if the recording device is a hard disk recorder or the like. However, in an optical disk reproducing apparatus such as a DVD player, the disk is erased when a predetermined period elapses or when the optical disk is replaced. For this reason, the thumbnails have to be regenerated every time a predetermined period elapses or every time the optical disk is replaced.

In relation to the above, Patent Document 1 discloses an image reproducing device capable of quickly displaying thumbnail images. This image playback apparatus stores thumbnail image data for an optical disk that has been played back once in the storage means even after the recording medium is taken out, and displays a list in response to a request for thumbnail list display. The thumbnail control means displays a list of thumbnail images based on the stored thumbnail image data when a display request is made.
JP 2004-228714 A

  However, the image reproduction apparatus of Patent Document 1 can reduce the display time for the second and subsequent thumbnail display, but the first generation of thumbnails has a problem that it takes the same generation processing time as before. Further, when the contents of thumbnails once generated for each optical disc are changed later, for example, when adding or deleting, there is a problem that all thumbnails must be regenerated.

  The present invention has been made in view of the above problems, and can reduce the processing time when the thumbnails are generated for the first time, and regenerate the contents of the thumbnail images generated and recorded for each optical disc. An object of the present invention is to provide an optical disk reproducing apparatus that can edit without any problem.

  In order to achieve the above object, an optical disk reproducing apparatus of the present invention includes a recording unit and representative image generating means for generating a representative image by performing reduction processing on a still image extracted from image data recorded on the optical disk. And identification information acquisition for acquiring identification information for uniquely identifying the optical disc from information recorded in a predetermined recording area of the optical disc in an optical disc playback apparatus comprising a list display means for displaying a list of representative images Means for generating a representative image from an image being reproduced using the representative image generating means at predetermined intervals during reproduction of the optical disc, and a representative image generated by the representative image generating means And related information that associates the identification information acquired by the identification information acquisition means with the representative image in the recording unit And when the list display means detects the display instruction of the representative image, the identification information acquisition means is used to acquire the identification information of the optical disc, and the representative image associated with the acquired identification information is displayed. It discriminate | determines using the said relevant information, It reads from the said recording part, It is characterized by the above-mentioned.

  According to this, the optical disc playback apparatus of the present invention generates a thumbnail (= representative image) by performing reduction processing on a moving image recorded on an optical disc such as a DVD or an image extracted from a still image. (= Representative image generation means) and a list display section (= list display means) for displaying a list of the contents of data recorded on the optical disc using thumbnails for each title or chapter.

  Further, identification information acquisition means (= identification information acquisition means) for acquiring identification information for uniquely identifying the optical disk from information recorded in a predetermined recording area of the optical disk, and when reproduction of the optical disk is started The reproduction time generation unit (= reproduction time generation means) that generates a thumbnail from the image being reproduced using the thumbnail generation unit every predetermined time, for example, every five minutes, the thumbnail generated by the thumbnail generation unit, and the identification information And a thumbnail recording unit that records the related information in association with the thumbnail in a memory (= recording unit).

  Further, when the list display means accepts a thumbnail display instruction, the identification information acquisition means is used to acquire the identification information of the reproduction target optical disc, and the thumbnail corresponding to the acquired identification information is read from the memory and displayed. In addition, when the thumbnail corresponding to the acquired identification information is not recorded in the memory, it is desirable to newly generate a thumbnail or not display the thumbnail.

  In order to achieve the above object, the optical disc reproducing apparatus of the present invention includes an edit instruction receiving unit that receives an edit instruction for the related information, and the edit instruction receiving unit adds a representative image associated with the identification information. , Receiving an instruction regarding deletion and rearrangement, and changing the contents of the related information based on the instruction.

  According to this, the editing instruction receiving unit (= editing instruction receiving means) receives an editing instruction for related information recorded in the memory. The editing instruction relates to addition, deletion, and rearrangement of thumbnails recorded for each optical disc based on the identification information. This eliminates the need to delete and re-generate the recorded thumbnail list when it is desired to change the thumbnail list after generating the thumbnail.

  In order to achieve the above object, the optical disc playback apparatus of the present invention includes generation instruction reception means for receiving a generation instruction of a representative image from a user during reproduction of an optical disk, and the generation instruction reception means receives the generation instruction. A representative image is generated from the image reproduced at the time of reception using the representative image generation means, and recorded in the recording unit in association with the identification information using the representative image recording means. .

  According to this, a generation instruction receiving unit (= generation instruction receiving means) that receives a thumbnail generation instruction from the user during reproduction of the optical disc is provided. The generation instruction receiving unit generates and records a thumbnail from the image being output to the display device using the thumbnail generation unit when the generation instruction is received. Therefore, the user can generate a thumbnail from an arbitrary scene simply by operating a button while viewing the screen during playback.

  In order to achieve the above object, in the optical disc playback apparatus of the present invention, the playback time generation means receives an instruction as to whether or not to generate a representative image during playback of the optical disc, and is instructed not to generate it. In this case, the generation process is not performed.

  According to this, the generation unit at the time of reproduction receives ON / OFF of the operation in advance on the user setting screen or the like, and determines the operation according to the received instruction. Therefore, unnecessary processing is not performed for a user who does not want to automatically generate thumbnails.

  In order to achieve the above object, in the optical disc playback apparatus of the present invention, the playback time generation means receives an instruction about an interval for generating a representative image during playback of the optical disc, and the representative image is based on the received interval. It is characterized by generating.

  According to this, the reproduction time generation unit accepts an instruction for generating thumbnails during reproduction of the optical disc, that is, every few minutes. For example, thumbnails are generated every five minutes when five minutes are specified, and every tenth when sufficient is specified. Thereby, the user can automatically generate thumbnails at desired intervals.

  In order to achieve the above object, the optical disc reproducing apparatus of the present invention receives a representative image selection instruction on the representative image list screen displayed by the list display means, and associates the representative image with the selected representative image. The image is reproduced from the portion where the representative image is extracted.

  According to this, when the user selects a thumbnail on the thumbnail list screen displayed by the list display unit, image playback is started from the scene from which the thumbnail is extracted. Therefore, the user can easily instruct playback from the middle of the moving image.

  In order to achieve the above object, the optical disc reproducing apparatus of the present invention is characterized in that the identification information acquisition means uses image information of a predetermined byte from the head of the image recording area of the optical disc as the identification information.

  According to this, the identification information acquisition unit acquires the top data of the image recording area of the optical disc, for example, pack data of 1048 bytes which is the minimum unit of the image data, and uses this as identification information. Since such pack data has different contents for each optical disk, the optical disk can be reliably identified.

  According to the present invention, identification information for uniquely identifying an optical disk is acquired from information recorded in a predetermined recording area of the optical disk, and thumbnails are generated and identified every predetermined time during reproduction of the optical disk. Record with information. When a thumbnail display instruction is received, the thumbnail corresponding to the identification information is read from the memory and displayed. For this reason, since thumbnails are performed during playback of the optical disc, the user does not feel the waiting time due to the thumbnail generation processing. In addition, since the thumbnail generated for each optical disk remains even after the optical disk is replaced, it is not necessary to regenerate, and the generation process can be made more efficient.

  According to the present invention, the editing instruction receiving unit receives and executes instructions for adding, deleting, and rearranging thumbnails recorded for each optical disc. For this reason, since only a part of the thumbnails can be edited without being regenerated, user convenience can be improved.

  According to the invention, the generation instruction receiving unit generates and records a thumbnail from the image being output to the display device when the generation instruction is received. Therefore, the user can easily generate a thumbnail by simply operating a button while viewing the screen during reproduction, and the convenience for the user can be improved.

  According to the present invention, the reproduction time generation unit accepts ON / OFF of the operation in advance on a user setting screen or the like, and does not perform unnecessary processing for a user who does not want to automatically generate thumbnails. , The processing efficiency can be improved.

  Further, according to the present invention, it is possible to specify an interval for generating thumbnails during playback of an optical disc. Thereby, since it is possible to automatically generate thumbnails at desired intervals, user convenience can be improved.

  According to the present invention, when the user selects a thumbnail on the thumbnail list screen displayed by the list display unit, the reproduction of the image is started from the scene from which the thumbnail is extracted. Thereby, user operability can be improved.

  According to the present invention, the head data of the image recording area of the optical disc, for example, pack data of 1048 bytes, which is the minimum unit of the image data, is acquired and used as identification information. For this reason, the optical disk can be reliably identified, and erroneous recognition of the optical disk can be prevented.

  An embodiment of the present invention will be described below with reference to the drawings. In addition, embodiment shown here is an example and this invention is not limited to embodiment shown here.

<1. Internal configuration>
FIG. 2 is a block diagram showing a DVD player 1 (= optical disc playback apparatus) according to an embodiment of the present invention. The DVD player 1 includes at least a control unit 11, a memory 12, a DVD drive 13, a data input unit 14, a signal processing unit 15, an OSD processing unit 16, an image signal superimposing unit 17, a data output unit 18, a ROM 19, an operation unit 20, The display unit 21 is included.

  The control unit 11 is a central processing unit for controlling the respective units of the DVD player 1 so as to control the optical disc reproduction process, for example, the reproduction of a program recorded on the DVD medium 91, for example. The control unit 11 includes a plurality of arithmetic processing devices such as a microprocessor. The control unit 11 is a central part that controls each device, for example, the image signal superimposing unit 17 and the like, calculates data, processes, and the like.

  In addition, the control unit 11 includes a list display unit 11a to a generation instruction reception unit 11g illustrated in FIG. 1 as functional units realized by executing a program on the arithmetic processing device included in the control unit 11. Details of these functional units will be described later.

  The memory 12 is a medium for temporarily recording various data held by the DVD player 1, and is configured by, for example, a writable RAM (Random Access Memory). The memory 12 has a role as a buffer memory for temporarily recording, for example, processing data when a reproduction process is performed by the control unit 11 and an instruction command received from a user.

 The DVD drive 13 is an optical device for optically reading various data from an optical disk such as a CD medium or a DVD medium 91. Since there are a plurality of standards for optical disks, various processes (reproduction processes, etc.) cannot be performed unless an optical disk conforming to the standards supported by the DVD drive 13 is used.

  The data input unit 14 is an input interface for inputting image signals and audio signals from an external device such as an antenna device. It also has a role of inputting digital information obtained by compressing image signals and audio signals by a specific compression method. The data input unit 14 is configured to include external connection terminals such as an RCA terminal, an S terminal, and a D terminal, for example.

  The signal processing unit 15 generates digital information by compressing an image signal by a moving image compression method such as MPEG2 or compressing an audio signal by an audio compression method such as Dolby AC-3 or LPCM. As a signal to be compressed, for example, an image signal or an audio signal input from the data input unit 14 is a compression target. Conversely, it also has a function of decoding compressed digital information input from the DVD drive 13 or the like into an image signal and an audio signal.

  The OSD processing unit 16 generates an image signal for displaying a still image such as a character image or an icon. Specifically, for example, a recording reservation screen for a user to make a recording reservation or an image signal for displaying a thumbnail image extracted from moving image data is generated. An image signal generated by the OSD processing unit 16 is given to an image signal superimposing unit 17 described later, and is superimposed on other image signals.

  The image signal superimposing unit 17 superimposes the image signal given from the signal processing unit 15 and the image signal given from the OSD processing unit 16 and converts them into primary color signals. The image signal superimposing unit 17 is realized by an integrated circuit such as an LSI chip, for example. For example, the image signal superimposing unit 17 superimposes the DVD reproduction image given from the signal processing unit 15 and the character image for the menu screen given from the OSD processing unit 16. Then, it is converted into one image signal and given to the data output unit 18.

  The data output unit 18 is an output interface for outputting an image signal and an audio signal to an image display device such as a liquid crystal monitor connected to the DVD player 1 and an audio device such as a speaker. The ROM 19 is a recording medium that can only read information. For example, program data for performing image reproduction processing using the control unit 11, initial setting information of the DVD player 1 at the time of factory shipment, and the like are recorded in the ROM 19.

  The operation unit 20 is used for a user to perform various instructions for the DVD player 1, for example, a reproduction instruction or a display switching instruction. The operation unit 20 is usually composed of a plurality of buttons such as numeric buttons and cursor buttons. The display unit 21 is for displaying various information held by the DVD player 1, for example, the operating state and the playback time of moving images to the user. The display unit 21 is preferably a small display device that consumes less power, such as a liquid crystal panel.

<2. About the configuration of the function section>
Here, the relationship between the functional units for performing thumbnail display processing in the DVD player 1 according to an embodiment of the present invention will be described with reference to the functional block diagram of FIG.

  As shown in FIG. 1, at least the thumbnail display processing of the present invention includes at least a list display unit 11a, a thumbnail generation unit 11b, an identification information acquisition unit 11c, a thumbnail recording unit 11d, a reproduction generation unit 11e, and an editing instruction reception provided in the control unit 11. This is implemented by the unit 11f, the generation instruction receiving unit 11g, the memory 12, the DVD drive 13, the signal processing unit 15, the OSD processing unit 16, and the image signal superimposing unit 17.

  For example, when the DVD medium 91 is inserted into the DVD drive 13 or when a list display instruction of a moving image included in the DVD medium 91 is received from the user, the list display unit 11a stores the moving images recorded on the DVD medium 91. Are displayed using the OSD processing unit 16. As thumbnails to be displayed, thumbnails for each DVD medium 91 recorded in advance in the memory 12 by a thumbnail recording unit 11d described later are used. When no thumbnail is recorded in the memory 12, it is desirable that the user can select in advance whether to newly generate a thumbnail or to hide the thumbnail.

  The thumbnail generation unit 11b generates thumbnails by extracting images from moving images and still images recorded on the DVD medium 91 and performing reduction processing. The generated thumbnail is given to the thumbnail recording unit 11d.

  The identification information acquisition unit 11 c acquires identification information for uniquely identifying the DVD medium 91 from the DVD medium 91. As the identification information, for example, pack data of 1048 bytes which is the minimum unit of image data recorded at the head of the image recording area of the DVD medium 91 is used. The acquired identification information is given to the thumbnail recording unit 11d.

  The thumbnail recording unit 11d records related information in which the thumbnail given from the thumbnail generation unit 11b and the identification information given from the identification information acquisition unit 11c are associated with the thumbnail in the memory 12. As a result, thumbnails can be individually recorded for each DVD medium 91. Therefore, even when the DVD medium 91 is replaced, the thumbnail corresponding to the DVD medium 91 can be read from the memory 12 by acquiring the identification information from the DVD medium 91.

  When the reproduction of the DVD medium 91 is started, the reproduction time generation unit 11e uses the thumbnail generation unit 11b to generate thumbnails from the moving image of the scene being reproduced every predetermined time, for example, every five minutes or every sufficient time. Generate. Note that the starting point serving as a reference for measuring the elapsed time may be a playback start point by a user operation, or the beginning of the moving image data of the DVD medium 91, that is, the beginning scene of the moving image (= the playback time is 0). May be a minute). The reproduction time generation unit 11e can switch its operation by receiving from the user in advance ON / OFF of the execution of the automatic thumbnail generation function.

  The editing instruction receiving unit 11f receives an editing instruction for related information recorded by the thumbnail recording unit 11d. Thereby, it is possible to delete, add, and sort the display order of thumbnails recorded for each DVD medium 91. Specifically, for example, when the user gives an instruction to edit a thumbnail image using the operation unit 20, the instruction is received by the edit instruction receiving unit 11f, and the thumbnail and related information are edited according to the instruction. The editing result is recorded in the memory 12.

  The generation instruction receiving unit 11g receives a thumbnail generation instruction by a user's manual operation during reproduction of moving image data. Specifically, for example, when the user operates a thumbnail generation button using the operation unit 20, a thumbnail image is generated from the image being reproduced (= the image displayed on the display screen). The generated thumbnail image is recorded in the memory 12 in association with the identification information together with the thumbnail generated by the reproduction time generation unit 11e.

<3. Thumbnail display screen>
Here, an example of a thumbnail display screen in the DVD player 1 according to an embodiment of the present invention will be described with reference to the screen diagrams of FIGS. The thumbnail display screen shown below is displayed, for example, when the DVD medium 91 is loaded in the DVD drive 13 or when a display instruction such as a chapter list screen is received from the user.

  As shown in FIG. 3, the thumbnail display screen 50 generated by the DVD player 1 of the present invention is configured to include at least a thumbnail 51 (= representative image) and a cursor 52. Although not shown in FIGS. 3 to 5, in addition to this, character information for displaying a title, a reproduction time, and an operation menu may be generated and displayed by the OSD processing unit 16.

  In FIG. 3, six thumbnails, thumbnails 51a to 51f recorded in the memory 12 by the thumbnail recording unit 11d are displayed. By operating the cursor 52 using the operation unit 20, the user can start playback from the scene indicated by the thumbnail, delete or add a thumbnail, and the like.

  In FIG. 3, for example, when an operation for deleting the thumbnail 51e is performed, the thumbnail display screen 50 is in the state shown in FIG. Here, the thumbnail 51f moves to the position where the thumbnail 51e exists, and the right side thereof is blank.

  When a thumbnail addition operation is performed in FIG. 4, the thumbnail display screen 50 is in the state shown in FIG. Here, a thumbnail 51g is added and displayed on the right side of the thumbnail 51f. The addition of the thumbnail is performed, for example, when the user specifies the playback time of the moving image or presses the add thumbnail button during the playback of the moving image.

  When an editing operation is performed on the thumbnail display screen shown in FIG. 3 and the state changes to the state shown in FIG. 4 or FIG. 5, the editing instruction accepting unit 11f displays data for displaying the thumbnail display screen reflecting these user operations, Specifically, thumbnails and related information are recorded in the memory 12, and old related information before editing is deleted. It is also desirable to delete thumbnails that are no longer needed.

<4. About thumbnail generation processing>
Here, the thumbnail generation processing in the DVD player 1 according to an embodiment of the present invention will be described with reference to the block diagrams of FIGS. 1 and 2 and the flowchart of FIG.

  FIG. 6 is a flowchart showing a thumbnail generation processing flow according to an embodiment of the present invention. This processing is started when the DVD player 1 performs playback processing of the BD media 91 inserted into the DVD drive 13.

  After the start of this process, the generation instruction reception unit 11g determines whether or not a thumbnail generation instruction by a user operation has been detected in step S110. The thumbnail generation instruction is issued, for example, when a thumbnail generation button provided in the operation unit 20 is pressed by the user. When the generation instruction is detected, the process proceeds to step S140, which will be described later, and the thumbnail generation unit 11B is used to generate a thumbnail from the image that was being reproduced when the generation instruction was detected.

  When the generation instruction is not detected, the reproduction time generation unit 11e determines whether or not the automatic thumbnail generation function is set to ON in step S120. If it is not ON, the process proceeds to step S150 described later.

  If ON, the reproduction time generation unit 11e determines whether or not a predetermined time has elapsed since the reproduction was started in step S130. For example, if it is preset that thumbnails are generated every five minutes, it is determined whether or not a multiple of five minutes such as five minutes, sufficient, and fifteen minutes have elapsed. Alternatively, the time when the previous thumbnail was automatically generated may be recorded in the memory 12, and it may be determined whether a predetermined time has elapsed from that time.

  If it is determined that the predetermined time has elapsed, the reproduction time generation unit 11e generates a thumbnail from the image being reproduced when the predetermined time has elapsed in step S140. Conversely, if it is determined that the predetermined time has not elapsed, the process proceeds to step S150, and it is determined whether or not an instruction to stop the reproduction process has been detected. The instruction to stop the reproduction process is issued, for example, when the user presses the reproduction stop button or when an instruction to stop the power supply of the DVD player 1 is given.

  If the playback stop instruction is not detected, the process proceeds to step S110 again, and the playback process and the thumbnail generation process are continued. When the reproduction stop instruction is examined, the identification information acquisition unit 11c acquires the identification information from the DVD medium 91 attached to the DVD drive 13 in step S160. The acquired identification information is given to the thumbnail recording unit 11d.

  Next, the thumbnail recording unit 11d associates the one or more thumbnails generated in step S140 with the identification information acquired in step S160. In step S170, the associated thumbnail and related information are recorded in the memory 12, and then the present process is terminated.

<5. Thumbnail display processing and editing processing>
Here, regarding the thumbnail display processing and generation processing in the DVD player 1 according to an embodiment of the present invention, the block diagrams of FIGS. 1 and 2, the screen diagrams of FIGS. 3 to 5, and the flowchart of FIG. It will be explained while using.

  FIG. 7 is a flowchart showing a processing flow of thumbnail display processing and editing processing according to an embodiment of the present invention. This process is started by detecting that the BD media 91 has been inserted into the DVD drive 13.

  After the start of this process, the identification information acquisition unit 11c acquires the identification information from the DVD medium 91 attached to the DVD drive 13 in step S210. The acquired identification information is given to the list display part 11a.

  Next, the list display part 11a reads the relevant information corresponding to the identification information given from the identification information acquisition part 11c from the memory 12 in step S220. If the relevant information does not exist (step S230), the process is terminated. If there is relevant information, the thumbnail indicated by the relevant information is read from the memory 12. In step S240, thumbnails are displayed as a list. As a result, for example, a thumbnail display screen as shown in FIG. 3 is displayed.

  Next, in step S250, the control unit 11 determines whether a thumbnail selection instruction has been detected. The selection instruction is issued, for example, when the user moves the cursor 52 using an operation button included in the operation unit 20 and presses the enter button while the cursor is on an arbitrary thumbnail.

  In step S251, the control unit 11 that has detected the selection instruction reproduces the moving image from which the thumbnail is extracted from the scene indicated by the thumbnail image. For example, in the example shown in FIG. 3, when the thumbnail 51a is selected, the reproduction is started from the golf scene. When reproduction is started by thumbnail selection, it is desirable not to perform the thumbnail automatic generation processing shown in FIG. 6 described above, but it may be in a form that can be selected in advance by user settings.

  If no thumbnail selection instruction is detected in step S250, the editing instruction receiving unit 11f determines in step 260 whether a thumbnail editing instruction has been received. The editing instruction is issued, for example, when the user selects execution of thumbnail editing using the operation unit 20 in the setting menu displayed on the OSD.

  If no editing instruction is detected in step S260, the process ends. When an editing instruction is detected, the editing instruction receiving unit 11f shifts to a thumbnail editing mode in step S270. And it will be in the state which waits for the edit instruction from a user. Examples of operations that can be executed in the edit mode include deletion, addition, and rearrangement of thumbnails. Thereby, for example, the thumbnail display screen shown in FIG. 3 can be changed to the state shown in FIGS.

  Next, in step S280, the editing instruction receiving unit 11f reflects the received editing content on the thumbnails and related information recorded in the memory 12, and then ends the process. It is desirable to delete related information before editing and thumbnail images that are no longer needed.

[Other embodiments]
The present invention has been described with reference to the preferred embodiments and examples. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea. be able to.

Therefore, the present invention can also be applied to the following embodiments.
(A) In the present embodiment, the target data moving image for generating a thumbnail is described. However, a still image may be generated, or a thumbnail from an optical disc in which a moving image and a still image are mixed. The form which produces | generates and displays a list | wrist may be sufficient.

  (B) In this embodiment, various function units related to thumbnail generation processing, thumbnail display processing, and thumbnail editing processing are realized by executing a program on an arithmetic processing unit such as a microprocessor. The part may be realized by a plurality of circuits.

  (C) In this embodiment, the DVD player 1 is taken as an example of an optical disk reproducing device, but the concealing process of the present invention may be implemented in another optical disk device having a superimposed display function. For example, the embodiment may be implemented in a BD-R player or an HD-DVD player.

These are functional block diagrams which show the structure of the function part with which the optical disk reproducing device of this invention is provided. These are the block diagrams which show the internal structure of the optical disk reproducing | regenerating apparatus of this invention. These are screen views showing an example of a thumbnail display screen of the present invention. These are screen views showing an example of a thumbnail display screen of the present invention. These are screen views showing an example of a thumbnail display screen of the present invention. These are the flowcharts which showed the thumbnail production | generation process of the optical disk reproducing device of this invention. These are the flowcharts which showed the thumbnail display process and edit process of the optical disk reproducing device of this invention.

Explanation of symbols

1 DVD player (optical disk playback device)
11 Control section 11a List display section (list display means)
11b Thumbnail generator (representative image generator)
11c Identification information acquisition unit (identification information acquisition means)
11d Thumbnail recording unit (representative image recording means)
11e Reproduction unit (reproduction unit)
11f Editing instruction receiving unit (editing instruction receiving means)
11g Generation instruction receiving unit (generation instruction receiving means)
12 Memory (Recording part)

Claims (7)

A recording section;
Representative image generating means for generating a representative image by performing reduction processing on a still image extracted from image data recorded on an optical disc;
A list display means for displaying a list of representative images;
In an optical disk playback device comprising:
Identification information acquisition means for acquiring identification information for uniquely identifying the optical disk from information recorded in a predetermined recording area of the optical disk;
During reproduction of the optical disc, using the representative image generation means at predetermined time intervals, a reproduction time generation means for generating a representative image from the image being reproduced;
Representative image recording means for recording, in the recording unit together with the representative image, related information that associates the representative image generated by the representative image generation means with the identification information acquired by the identification information acquisition means;
With
When the list display means detects an instruction to display a representative image, the identification information acquisition means is used to acquire the identification information of the optical disc, and the representative image associated with the acquired identification information is used as the related information. Discriminating, reading from the recording unit and displaying,
An optical disc reproducing apparatus characterized by the above. Editing instruction receiving means for receiving an instruction to edit the related information,
The edit instruction receiving unit receives an instruction related to addition, deletion, and rearrangement of a representative image associated with the identification information, and changes the content of the related information based on the instruction. An optical disk reproducing device according to claim 1. During reproduction of the optical disc, a generation instruction receiving means for receiving a generation instruction for a representative image from a user is provided.
The generation instruction receiving means generates a representative image using the representative image generation means from an image reproduced when the generation instruction is received, and associates with the identification information using the representative image recording means. Recording in the recording unit;
The optical disk reproducing apparatus according to claim 1 or 2, characterized in that: The generation unit at the time of reproduction receives an instruction as to whether or not to generate a representative image during reproduction of an optical disc, and does not perform generation processing when instructed not to generate the image. Item 4. The optical disc playback device according to any one of Items 3 to 4. 5. The reproduction time generation means receives an instruction about an interval for generating a representative image during reproduction of an optical disc, and generates a representative image based on the received interval. The optical disc playback apparatus according to any one of the above. In the representative image list screen displayed by the list display means, an instruction to select a representative image is received, and an image associated with the selected representative image is reproduced from a location where the representative image is extracted. An optical disk reproducing apparatus according to any one of claims 1 to 5. The identification information acquisition means uses image information of a predetermined byte from the head of the image recording area of the optical disc as the identification information;
The optical disk reproducing apparatus according to claim 1, wherein: